Which of the relations below on the set of all people are equivalence relations? Determine the properties of an equivalence relation that the others lack (i. e. not reflexive, not symmetric, etc.) (a) {(a, b) | a and b are the same age} (b) {(a, b) | a and b have the same parents} (c) {(a, b) | a and b share a common parent} (d) {(a, b) | a and b have met} (e) {(a, b) | a and b speak a common language}

answer: idk

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

graph them on a graphing calculator, press 2nd trace. select intersect. hit enter until it says answer. ti 84 works best

step-by-step explanation: